Stop-motion



G. M. ARRAGG.

STOP MOTION. APPLICATION FILED MAY 7, 1919.

1,874,41 7, I Patented Apr. .12, 1921..

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INVENTOR.

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G. M. ARRAGG.

STOP MOTION.

APPLICATION FILED MAY7,1919.

1,374,417. Patented Apr-12,1921.

2 SHEETS-SHEET 2.

I N VEN TOR.

iwyzw W ATTORNEY.

FF-IC.

' GEORGE M. ARRAGG, OF LAWRENCE, MASSACHUSETTS.

STOP-MOTION.

ava-e17.

Specification of Letters Patent.

Patented Apr. 12,1921.

Application filed May 7, 1919. Serial No. 295,302..

To all whom it may concern:

Be it known that'I, GEORGE M. ARRAGG, a a citizen of Turkey, residi n atLawrence, in the county of Essex and tateof Massachusetts, have inventedcertain new and useful Improvements in Stop-Motions,of which thefollowing is a specification.

This invention relates to stop-motions for s innin frames and isarticularl an improvement on the device shown in patent to me of January18, 1916, No. 1,168,457.

On a cap spinning frame, where such device is especially useful, thereare'usually one hundred spindles on each side, and one spinner takescare of three sides or three hundred .spindles. Empty bobbins are placedon the spindles on one side and all are started together and are rununtil full, when all are stopped together. Thereby all have practicallythe same amount of yarn, except those whose ends have broken,

There must be sufiicient clearance between the delivery rolls and thecap and bobbin to allow for dofiing, but the guide eye for the yarn mustbe directly over the axis of the cap and bobbin and fairly near the topthereof to prevent the yarn from stretching and breaking. With mydevice, I prefer that the guide eye should be-carried by'the rockingmember, which must therefore be arranged so that it can be lifted enoughfor dofiing. Its back end or tail must be capable of sidewise motionbetween the vibrator and the flexible member.

When piecing, the tail of the rocking member should .be held up awayfrom the vibrator, and it is desirable that it should be held up as soonas the stop-motionhas acted. It is desirable that all the tails shouldbe held up when the frame is stopped .or slowed down to prevent thevibrator from acting and thus breaking the ends, or, thatp'rovisionshould be made so that the vibrator should stop just beforethe delivery rolls and spindles stop.

When a strand of roving breaks, it is desirable that delivery of its endshould cease and that an unskilled operator should be able to rapidlyand easily start and piece such ends and reset the stop-motion with-.out exercising much care.

It s my .purposeto provide means where-v by when an end does break, asis most common, between the delivery rolls and the bobbin, thestop-motion willact automatically to firmly and gently hold the roving,

gchine.

not to cut it, at the back rolls so that it will break ust back of thedelivery rolls, and so that the operator can, with one movement, startdelivery, then piece the ends, and by anothermovement reset thestop-mot1on for the next break, or, as will be explained, so that he canignore the broken end until the frame is doffed.

Especially on fine Work or when there is much vibration to the mill ormachinery,- and in any case for the best operation of such frames,the-rocking member should not chatter nor rock beyond certain limitsuntil an end breaks, or it will be struck by the vibrator and thestop-motion mechanism will act to unnecessarily stop delivery, but itshould be certain to tip when an end 'does with the doffing, and I makethe lifting plate of such form that the roving will break just behindthe front rolls.

\ In the drawings, Figure 1 is a diagrammatic side elevation of mydevice in place on a cap splnnlng frame of well known type,

the parts being shown in the running pos1t1on and the rocking memberbeing shown as one-piece. Fig. 2 isa side elevation in detail showing atwo-part rocking member, with the carriage for setting, vibrator andother parts in the position which they .assume after an end is broken,the tail of the rocking member has droppedand has beenpushed over by thevibrator, releasing the flexible member and the leaf spring. Fig. 3 is a.plan view of Fig. 2. Fig. 4 is a side elevation of the carriage andadjoining parts in the position assumed when the carriage is'pulledforward for setting. Fig. 5 is a plan View of Fig. 4. Fig. 6 is a. frontelevation of another form of guide'eye, and

Fig. 7 isa side elevation of'Fig. 6. Fig. 8 is a sideelevation ofanother form of guide eye. Fig. 9 is a .detail in perspective of aslightly modified form of padded roll" separating means. Fig. 10-is adetail showing the leaf spring retaining hook from the front.

A represents the frameof. a spinning ma- B represents-the cap, Gthebobbin, F and G the back-drawing rolls, H the top carrier rolls and Mthe bottom carrier rolls, K and L the front drawing rolls allsubstantially of usual construction, and N represents the roving fromthe roving spool.

The bottom back drawing roll G is positively driven by any usual meansas is also the bottom front drawing roll L. The top front drawing roll Kmaybe of any usual construction. For each strand or plurality of strandsof roving which are to be twisted into a single end, I use a separatetop back drawing roll F. Each is carried by a hanger 20 slidable througha hanger frame 21. Through each hanger 20 passes a hanger pin 22 intoframe 21, the. hanger being slidable thereon. Around pin 22 betweenhanger 20 and an adjusting nut 23 is a back roll spring 24 which tendsto keep the top back drawing roll F in engagement with the bot tom backdrawing roll Gr, whereby the yarn or roving N will be drawn in anddelivered in the usual manner.

Fixed to any suitable rail or bar 30 fixed to the frame of the machineare one or more L shaped plates 31, each with a horizontal shelf 32. Foreach back top roll F, I provide a lifting plate 33 pivoted to 31 withits free end at a point between rolls F and G not touching either. Theroving N passes between the end 34 of this lifting plate and;

top roll F.

A compression spring 35 between liftingplate 40 with a slot 41andashoulder 42 ber 44 which may be a chain or wire ropewhich projectsthereinto. A flexible memis fastened at one end to the bottom of liftinglate 33 and extends downward therefrom, preferably through lifting platespring 35, and through shelf 32 downward through slot 41 thence at asubstantially sharp angle backward to abar or shaft 9 attached to theframe where the other end is fastened.

T ransversely of the machine approximate to and preferably under thestretcher plates 40,

I place a vibrator rod 50 which carries fingers 51 which extend upwardand preferably partly over each stretcher plate 40 in proximity to themember 44 and under the end of a rocking member. This vibrator 50 ismoved back and forth continually .by any suitable means.

The shoulder 42. is at the front of .the slot 41 and on the sideadjoining the vibrator finger. As the back end of flexible member 44 isfixed, it is manifest" that if it is .pulled forward and caught overshoulder 42, it will pull downward lifting plate 33 wherein it isseparated from the bottom roll and moreover the. roving end will bepinched between the end 34 of the lifting plate and the surface of. thetop roll F and so held that the pull of the front rolls. K and L willbreak it between the front and back rolls.

As shown in Fig. 1', I may use a onepiece rocking member 0 pivoted tothe frame at 61 having-a light front part 14 terminating in thethread.guide at 19 between the front delivery rolls and the cap of thebobbin, and a heavier back part 10 which extends back beyond theflexible member 44 and the shoulder 42: The back part 10 is so placedwith reference to the vibrator finger 51 that, if the front part 14 isnot held down, the back part 10 by its own weight will drop in front of51 andyas the pivot for my rocking member is so madethat it can rockvertically and therear part can also move horizontally, whenstruckthereby, it will be moved overthe shoulder 42 pushing member 44 offtherefrom in a manner similar to that described in my aforesaid patentgThis rocking member is so placed and balanced that the action of theroving passing down from. the front rolls to the bobbin will depress thefront end and raise the back end above the path of-fingers 51 as shownclearly in Fig. 1.

I find that by forming the thread guide so that the roving N will begiven a'double bend out of a straight course, the tendency.

of the rocking member to chatter is overcome, and I consequently so formmy guide eye as to depress the front end of the rocking member while theroving is being wound or spun on the bobbin and to keep it steadilydepressed.

. AS shown in Fig. 2, I prefer, however, to enlarge the back end of thefront part 14 at 12 and to form a slot therein to receive the tail 13forming the front end of back part 10 which is so pivoted at 11thatitcan move horizontally and can be raised independently of the frontpart. Normally, however, they are in alinement and if either isdepressed the other'is elevated. I prefer the top and bottom back rolls,the guide eye 7 I and free end of the rocking member is depressed bythepull of the roving, the back its;

and forth according to the length of the v fiber operatedon, I-alsoprefer to form in nearly behind the front delivery rolls as this reasonthat I introduce part 10 is raised above the vibrator 51 and the machinekeeps on running until the end be pinched but not cut at the back rollsso that it will break just behind the front rolls whereby, when theframe is again started, it will automatically feed itself through thefront rolls, and to accomplish this I provide a pad 36,-preferably ofleather or similar yielding material, on the front edge of the liftingplate'where it comes in contact with the top back roll.

As the lifting plate must be moved back the bottom shelf 32 thereof anextension with a relatively long curved bearing trumpet 37 whereby theflexible member, which is shown as a wire 44, 'can easily run throughwithout turning any sharp corner.

My attachment is for the same purpose as the aforesaid patent but, asthe usefulness of such stop-motions is not only for saving waste andsaving labor but for such automatic action on all kinds ofstock thatlittle slanted fromfront'to back toward the'shoulskill or intelligenceis required from the operator, I have devised the improvements describedherein..

A simple straight guide eye will work satisfactorily with coarse yarnsand where there is lit le vibration, but with fine yarns, or where thereis vibration, there is a tendency for the rocking member 0 to, chatteror shake out of position, thus stopping the delivery rolls when notdesged. It is for e double bend in the guide attached tothe front partof the rocking member.

When a strand of roving breaks, it is usually between the bobbin and thedelivery rolls, and .for convenience in piecing up the broken end it isdesirable that not only should the back top roll be lifted, but thatroving should be automatically broken as possible. For this reason Iintroduced thepadded edge 36 on the lifting plate 33. This padded edgeholds the stock at that point but does not cut it andfas the distancebetween the front and back rolls is adjusted.

to be slightly more than the length of the fiber, the roving is gentlypulled apart-betweenthe front rolls and the forward carrier rolls justbehind the nip of the front rolls.

When an end breaks, the drag on. the guide eye ceases, and, the weightof the back part of the rocking member causes it to in front of thevibrator whereby the dro flexible member is released. I find itdesirable to immediately return the parts to their running positionbefore the broken end is pieced. For this purpose I use a hook 91 fixedto the stretcher plate 40 outside of the shoulder 42 and to pivot a leafspring 90 on a pivot 92 at the back of the, stretcher plate in suchmanner that it can move horizontally from side to side under the car-.

riage 71 and so that its front edge can be caught under hook 91.

' In this leaf spring 90 1' provide a forward 1 and back slot 93 whichis relatively narrow and which, in one position partly registers withthe slot 41 in the stretcher plate, and the forward part of which inanother position registers with the shoulder 42. This slot 93 isrelatively narrow and through it extends the flexible member 44. I mayprovide an extension, shown at 94, which is integral with the frontofthe spring extending under the back part 10 of the rocking member inwhatever position the spring may be.

The bottom of the carriage is so cut away that this spring can movehorizontally from right to left and the spring is sopositioned that,when the flexible member rests against shoulder 42, one edge of it willbe under or over hook 91.

The front edge 72 of carriage 71 may be der 42 and hook 91, or the partsmay be so positioned that the two ends of the flexible member 44 will beapproximately in a plane extending back of hook 91. In either case, whencarriage 71 is pulled forward, as shown in Fig. 4, .the flexible member.is

forced over on to shoulder 42, and the front sideof spring 90 is forceddown and over so as to be caught under hook 91. When carriage 71 ispushed back spring 90 is therefore caught and held until an end breaks,allowing 10 to drop in front of the vibrator which pushes it over, alsopushing over flexible' member 44 from the shoulder 42, and

this carries with it spring90 which is re-' leased from 91, upon whichits front end 94 springsup, lifting tail 10 up out of the way of thevibrator and allowing'the guide eye to drop back into the running'position whereby the broken end can readily be pieced. This arrangementprevents breakage and clears the back part of the rocking member frombeing struck by the vibrator until such time as the operator gets aroundto piecing the ends,

When the operator is ready to piece the end, it is necessary. only topull forward carriage 71, which has a raised part 74' under 10 of suchheight thatit holds up that part 10 when the leaf spring 90 isdepressed. The carriage is pulled forward by means of handle 7 0, thusbringing all parts to the running position, upon which the back rollsstart delivery and the broken end is automatically fed through the frontrolls and pieced by the operator.

When so pieced, the operator should push back handle 7 O and carriage 71to allow the trigger mechanism to work but, if he fails so to do, theframe continues to run as if my attachment were not there.

I prefer to make my rocking member 0 in two parts pivoted so that theback is heavier, as the space in such machines must necessarily belimited and, in removing the cap and spindle, it is necessa-ry to liftthe front part for clearance.

I also prefer to use a lifting bar, such as 8, running the length of theframe under the back parts of the rocking members with suitable devices,permitting it to be lifted just before the frame as a whole is to bestopped to prevent the back parts dropping as the speed decreases,unnecessarily breaking ends.

may use the form of guide eye shown in Figs. 6 and 7, wherein a wellknown form of guide eye so slants at an angle with the vertical insteadof slanting horizontally, that it gives a double bend to the roving.

I prefer the form of thread guide shown in Figs. 1 and 2, wherein theguide eye proper 19 is of the usual form, but at 17 a vertical armextends from the front part 14 and is bent over at 18 so that the doublelarge number of machines while they are running. In fact, the necessityfor spinners bend is made between 18 and 19.

In Fig. 8, I show still another form of guide eye, wherein the frontpart 130 of the rocking member 0 is bent around horizontally at- 131 toform a spiral guide eye and then extends upward and forward at 132,being again bent at 133 to give the roving end the doublebend desired.

If there is no stop-motion, the roving winds up on one of' the frontrolls which continues to run, forming what is known as lap waste or elsethe broken end runs on to an adjoining bobbin, thus making doublespinning and imperfect yarn.

In some mills, the broken ends are pieced after the lap waste has beenremoved, while in other mills the roving 1s broken by the operatorbehind the back rolls.

Where the first method is used, more production is obtained but there islikely to be a flaw in the yarn where it is pieced. Where the secondmethod is used, that particular bobbin is put out of action, and no moreyarn is spun on it until it is dofl'ed, but what yarn has been spun ismore perfect.

In either case, the operator must be constantly on the alert and must becontinually piecing ends or breaking the yarn, behind the back rolls. Aserious objection to breaking the yarn behind the back rolls is thatafter the frame is dofl'ed, in order to start each broken end, its topback roll must be 'lifted and all its top carrier rolls must be firmly,while the front rolls pull it apart at a point between themselves andthe front carrier rolls.

When broken at this particular point, it is not necessary to pass theroving again through the back roll, as whenthe operator starts themachine by dropping the back roll into place, the roving will be fedinstantly and automatically to the front roll.

With my device, whichever method is used, either piecing the broken endsor breaking them behind the back rolls, lap waste is prevented. Whenproduction is required the operator can piece the ends, but whenunpieced yarn is required, it is not necessaryto break the ends behindthe back rolls as when the top back roll is lifted, delivery is stoppedand the roving is gently held and broken behind the front rolls. Oneoperator can therefore take care of a very is done away with altogetherexcept to generally supervise perhaps ten or twenty machines.

The only operators required, are the doflers. Steadiness 1n the rockingmembers, posi v adapted to separate the back drawing rolls.

I will call the flexible means with the stretcher plate and connectionsmeans for holding such padded means out of action, and I will call thevibrator. power driven means for releasing the last named means.

I claim:

. 1. In a spinning frame having back drawing rolls, front drawing rollsand a bobbin, the combination of a two-part rocking member, the frontpart terminating in a thread guide over the bobbin between the frontdrawing rolls 'and the bobbin so arranged that the roving will be givenadouble bend in passing therethrough, and being pivoted to pivoted to theback of the; stretcher plate that it can-be caught under the hook withits front end under the rear part of the rocking member, and a flexiblemember which passes through both slots, together with a carriage adaptedto slide under the back part of the rocking member and over the springto set the flexible member on the shoulder of the stretcher plate and todepress and catch the spring under the book by the same movement, andpadded means held out of action by the flexible member for separatingthe back drawing rolls, and for holding the roving thereat whereby it isbroken behind and close to the front rolls.

2. In a spinning frame having back drawing rolls, front drawing rollsand a bobbin, the combination of a two-part rocking member, the frontpart terminating in a thread guide over the bobbin between the frontdrawing rolls and the bobbin so arranged that the roving will be given adouble bend in passing therethrough, and being pivoted to rockvertically on the frame, and the rear part being pivoted to the frontmember so as to rock vertically independent thereof and to swinghorizontally, both Within the limits of suitable stops, with a vibrator,a stretcher plate in which is a slot having a shoulder, a hook carriedby such stretcher plate, a spring having a slot" in operative relationwith the slot and shoulder of the stretcher plate so pivoted to the backof the stretcher pla that it can be caught under the hook-wit its frontend under the rear part of the rocking member, and a flexible memberwhich passes through both slots, and padded means held out of action bythe flexible member for separating the back drawing rolls and am holdingthe roving thereat whereby it is broken behind and close to thefrontrolls.

3. In a spinning frame having back drawing rolls, front drawing rollsand a bobbin, the combination of a rocking member, the front partterminating in a thread guide over the bobbin between the front drawingrolls and the bobbin so arranged that the roving will be given a doublebend in passing therethrough, and being pivoted to rock vertically onthe frame, and to swing horizontally, with a vibrator, a stretcher platein which is a slot having a shoulder, and a flexible member which passesthrough both slots, and padded means held out of action by the flexiblemember for separating the back drawing rolls and for holding the rovingthereat whereby it is broken behind and close to the front rolls.

4. In a spinning frame having front drawing rolls, a bobbin, andseparable back drawing rolls, the combinationof a rocking member, thefront part terminating in a thread guide over the "bobbin between the"front drawing rolls and the bobbin pivoted to rock on the frame, withpadded means adapted to separate the back drawing rolls when released,means for normally holding such padded means out of action, and powerdriven means for releasing the last named means and the padded meansadapted to 010* crate by the action of the rocking member.

5. In a spinning frame having front drawing rolls, a bobbin, andseparable back drawing rolls, the combination of a rocking member, thefront part terminating in a thread guide over the bobbin between thefront drawing rolls and the bobbin pivoted to rock on the frame, withpadded means adapted to separate the back drawing rolls when released,means for normally holding such padded means out of action, and powerdriven means for releasing the last named -means and the padded meansadapted to opcrate by the action of the rocking member,

together with spring mechanism releasable by such power means whenoperated by the rocking member'to return the rocking memher to itsnormal position.

6. In aspinningframe having front drawing rolls and a bobbin, togetherwith back drawing rolls, one of which is positively driven and the otherspring-pressed against it, the

combination of a rockin member, the front part terminating in a t readguide located over the bobbin between the front drawing rolls and thebobbin so arranged that the roving will be given a double bend inpassing therethrough and being pivoted to rock on the frame, with paddedmeans adapted to separate the back drawing rolls, and mecha-.'

nism operative by the rocking member which normally holds-the paddedmeans out of action.

7. In a spinning frame having front drawing rolls, a bobbin, andseparable back drawing rolls, the combination of a rocking member, thefront part terminating in a thread guide over the bobbin between thefront drawing rolls and the bobbin pivoted to rock on the frame, withpadded means adapted to separate the back drawing rolls when released,means for normall padded means out of actlon, and means for releasingthe last named means and the padded means adapted to operate by theaction of the rocking member.

8. In a spinning machine having front drawing rolls and a bobbin, thecombinaholding such Y roving passes so located that the roving, in

ing therethroug ii passing from the front drawing rolls to the bobbin,w'ill be ;given a double bendout of a: straight coursesufiiciently todepress such eye and-rocking member when the roving is being wvound orspnn on the bobbin, together with mechanism operative by the rockingv@member adapt-ed to stop the delivery of roving when :an end breaks.

9. In a spinning :frame, a rocking memher, the -Ziiront part of whichterminates in a thread guide :between the front drawing rolls and thebobbin so arranged that the roving will be 'vena double bend in pass-1O. In a spinning frame having a positively driven bottom back drawingroll and a top back drawing roll driven therefrom which can be moved out'of engagement therewith, a padded lifting member nor- .mally heldout ofaction and out of contact with both the top and bottom back drawingrolls, adapted when released to move the top back drawing roll away fromthe bottom back drawing r011 without coming in contact with said bottomback drawing roll and to stop said top back drawing foll from revolving.

In testimony whereof I have afiixed my signature.

GEORGE M. ARRAGG.

